Barking mad! David Walliams and Alan Carr dress up as Pudsey the Dog and Ashleigh for hilarious sketch at the Royal Variety Performance

He's never one to shy away from poking fun at himself or dressing up as all manner of strange characters on his sketch shows.

But on Monday night David Walliams took on his most testing role to date, dressing up as Pudsey the dog for the 100th Royal Variety Performance at the Albert Hall.

The 41-year-old comedian took to the stage in an animal costume to perform a hilarious sketch alongside fellow funnyman Alan Carr.

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What a pair: David Walliams and Alan Carr took to the stage at the 100th Royal Variety Performance at the Royal Albert Hall in London dressed as Pudsey the dog and his owner Ashleigh

The Chatty Man host left the crowd in stitches as he arrived on stage in a leopard print dress and matching boots, pretending to be Pudsey's owner Ashleigh.

The comic duo performed a series of poses, including one particularly hilarious movement that saw Alan climb onto David's back.

Given that the pair were performing in front of The Queen and Prince Phillip, they put their best efforts into the silly sketch and moved around the stage with gusto.

Easy does it: The Chatty Man host looked a little bit unsteady as he mounted David

Interesting attire: While David was dressed in a fluffy dog costume, Alan took to the stage in a leopard print dress

While the pair put on their best efforts they failed to match up to the real Pudsey and Ashleigh, who wowed crowds with an amazing James Bond-inspired routine.

Walliams caught up with the duo backstage and tweeted that he would like a Pudsey puppy for his own dog.

He posted: 'Me and the brilliant Ashleigh and Pudsey last night. I want a Pudsey puppy as a friend for Bert. Dx'

Do you know how ridiculous you look? Alan and David struggled to keep a straight face during their time on stage

What a great team! The pair sent the Royal Albert Hall into fits of giggles with their silly act

Hand in hand: The pair finished their stint by bowing to the Royal box and looked remarkably like Ashleigh and her dog

David, who recently revealed he and
wife Lara Stone are expecting their first child together, had other
duties to perform during the evening, as host of the show.

The
Little Britain star jetted onto the stage at the start of the show,
trying to emulate Britain's most famous fictitious agent. And it appears that David had a
brilliant time at the show, telling his fans on Twitter it was a
highlight in his successful career.

Not a patch on the real deal: Ashleigh and Pudsey also took to the stage to perform a spectacular set

Hand in hand: The pair finished their stint by bowing to the Royal box

He posted: 'I took my bow between
Kylie and Neil Diamond, and then chatted to the Queen! It was the best
night of my career by a long way Dx'

While David changed into a smart suit to greet the monarch, Alan decided to stay in his stage costume.

And the 36-year-old was more than aware of his ridiculous appearance and today he tweeted: 'Who knew leopard skin could be so unflattering?'

The 100th Royal Variety Performance will be aired on ITV1 on December 3.

Career highlight: David Walliams tweeted to say that meeting the Queen was the best moment of his career

Smiles all around: Alan Carr didn't get changed for his Royal appointment and was still wearing his leopard print dress when he met the Queen